Combining high-speed data and analog video on an optical fiber
a high-speed data and analog video technology, applied in the field of communication over optical fibers, can solve problems such as the problem of analog video signals
Inactive Publication Date: 2005-04-28
MARGALIT NEAR
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Problems solved by technology
Analog video signals become a problem when such signals need to be transmitted over high-speed data networks.
However, data is handled by equipment completely different from that used for video, and therefore video signals must be inserted into the optical fiber separately from the digital data transmitter, and extracted from the optical fiber separately from the digital data receiver.
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[0007] To allow bi-directional data transmission over a single optical fiber, optical di-plexers are presently used in optical transceivers, as shown in FIG. 6. In the diplexer, an angled unidirectional mirror allows the light generated by the laser transmitter to pass through, and continue in a straight line towards the optical fiber. Light arriving through the fiber from the opposite side of the optical fiber does not pass through the mirror, and is deflected in an angle towards the optical receiver's photodiode.
[0008] Bi-directional data transmission can be done using a single wavelength for transmission in both directions. However, very often data is transmitted in one direction using one optical wavelength, and a different wavelength is used for data transmission in the opposite direction.
[0009] An optical tri-plexer is an extension of the optical di-plexer, whereas it allows the combination of two optical transmitters and a single optical receiver, or one optical transmitter...
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The invention provides means and methods for combining high-speed data and analog video signals over the same optical fiber. Optical diplexers and tri-plexers are employed to combine bi-directional data transmission and uni-directional video transmission over a single optical fiber. In one aspect, optical diplexers and tri-plexers of the invention include an optical data transmitter, an optical data receiver and an optical video receiver when they are disposed to function at the receiving end of a video signal. In another aspect, optical diplexers and tri-plexers of the invention include an optical data transmitter, an optical data receiver and an optical video transmitter when they are disposed to function at the transmission end of a video signal. The invention enables the simultaneous transmission of one signal to multiple video signal receivers. Numerous combinations of different optical wavelength pairs can be used to separate data and video signals.
Description
RELATED APPLICATIONS [0001] The present application claims priority to U.S. Provisional Application No. 60 / 507,963, filed Oct. 3, 2003. The cited Application is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION [0002] This invention relates to communication over optical fibers, and more specifically with combining data and video signals to be communicated by means of optical fibers. BACKGROUND OF THE INVENTION [0003] In many applications requiring very wide-band video signals, it is impractical to digitize such video signals, and it is desirable to transmit such signal over the communication medium as analog video signals. Typically the transmission medium is an optical fiber used in high-speed data network communications. Analog video signals become a problem when such signals need to be transmitted over high-speed data networks. Separation between the data and the video is possible by way of wavelength separation. However, data is handled by equipment complet...
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Login to View More IPC IPC(8): H04B10/24
CPCH04B10/40
Inventor MARGALIT, NEAR
Owner MARGALIT NEAR